Malicious PDF — malware analysis report

Static analysis result for SHA-256 36f903d9abdc3018…

MALICIOUS

PDF

41.4 KB Created: 2020-08-16 12:43:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f689c9f17ddb25fbb1c5c124d84ab4a1 SHA-1: b544b3630618a3d0985c5f7dadbb4b3983c1a865 SHA-256: 36f903d9abdc30181ba95681788f506a007480dd55c45fdfc8146a4d16d09eae
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the same text as the malicious URL's keyword parameter, suggesting a lure. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, many of which point to benign Shopify URLs, likely to mask the malicious redirector. The ML_NYX_PDF_MALICIOUS heuristic strongly supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=rewrite+the+stars+piano+sheet+music+advanced In PDF document text
    • http://siperazel.carolcgould.com/uploads/1/3/1/4/131452883/5714496.pdfIn PDF document text
    • http://dekoloxi.cyclebavaria.com/uploads/1/3/1/3/131379552/5590668.pdfIn PDF document text
    • http://files.angelapennisi.com/uploads/1/3/1/4/131454116/0e4373e8cf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5893/8531/files/allen_roth_ceiling_fan_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3651/5224/files/defense_devil_manga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7338/8190/files/budixejuvopanatugenijalub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3051/8682/files/84020236450.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4416/7064/files/tigup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3248/5799/files/domibawaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7920/5031/files/xexadidavox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9349/8787/files/at_t_international_day_pass_countries.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0659/1127/files/59734809008.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9665/4499/files/kaniletilajoki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0981/7251/files/18499211978.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/6048/2463/files/48203418480.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006232.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6232 5440 bytes
SHA-256: 5b545b09cacc2d70108b2079b16036930d48d2acb2d4e5c0c2cf2f76932739d9
font_01_sfnt_off0000749b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x749B 10460 bytes
SHA-256: 2883ef47c6229e8cb5a9c86191a6ffee409e7f877978023560669321efe62a97

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